src/Tribe/Templates/Map.php triggers this fatal error when you are viewing map view, then search “near” a state. Typing in the state doesn’t pull up a list of suggestions, but after hitting enter, the dropdown list appears with suggestions, select “State, USA”
My investigation reveals that this particular ajax_response() function is using class name Tribe__Notice when you have the class defined as Tribe__Notices. I can reproduce this problem on your DEMO site too, just gotta find a location where you don’t have demo event data (like Brisbane QLD, Australia)
Unrelated, but you also define the Tribe__Notices class twice. Once in the-event-calendar and again in event-tickets plugins. Not sure if the consequences of that has been accounted for.
I’m obviously just gonna patch my install up – but rather surprised this hasn’t ever been noticed before